Azoteq Announces IQS253 Ultra Low Power Capacitive Proximity and Touch Controller for Cell Phones and Tablets

Azoteq, the world leader in capacitive proximity sensing, today announced the IQS253, Azoteq’s latest addition to the ProxSense® family of capacitive proximity and touch controllers. The IQS253 sets new standards for proximity and touch sensing, with power consumption of 6 microampere, which is 20 to 50 times better than that of competitive devices.

Azoteq is the first to introduce a low pin-count capacitive controller that features projected (mutual) capacitance and self-capacitance in the same controller. The IQS253 uses advanced analog and digital circuitry to achieve unparalleled proximity and touch performance. The high sensitivity enables the IQS253 to work reliably through glass of up to 25 mm thick and achieves proximity detection of up to 250 mm with practical electrodes. The device can operate from 1.8 to 3.6V and achieves power consumption as low as 6 microampere while still sensing proximity and touch. The I2C compatible interface allows full control of the controller functions from a host microcontroller. The IQS253 features Azoteq’s patented DYCAL™ algorithm, which allows the sensor to track environmental changes during prolonged periods of activation.

“Azoteq controllers are widely used in tablets to meet FCC SAR requirements, and the IQS253 opens up new applications such as handheld detection, on-ear detection and proximity wake-up in cell phones and tablets,” said Jean Viljoen, Marketing Manager for Asia.

During the first and second quarters of 2012, Azoteq will release a full family of controllers based on the latest ProxSense® technology. The family will be expanded to include stand-alone controllers with up to 12 channels.


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